“The inspiration for the hair was Abigail’s mother in the late ‘70s,” says Streicher. For that kind of retro volume, Streicher loaded the actress’ roots with Oribe’s Dry Texturizing Spray ($39) and teased the hair on her crown with a fine-tooth comb. A few clip-in hair extensions gave fullness to the back of Spencer’s locks before Streicher pulled two side sections back and secured with bobby pins.

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To keep the volume going throughout the length, Streicher switched to a vent brush (try the Perfect Style Tunnel Vent Brush ($9) by Revlon). “Loosely rough up the hair with a brush or your fingers,” Streicher says. Serge Normant’s Meta Luxe Hair Spray ($25) set the style.